A gang of gunmen disguised in military-style uniforms and carrying forged arrest warrants killed 25 police Monday, then hoisted the battle flag of al-Qaida in a carefully planned early morning shooting spree in western Iraq, officials said. The killings in Haditha highlight al-Qaida's success in regaining a foothold in an area they once dominated through police executions and murdering city officials. By going after police, the militants demonstrate to the residents of Haditha, a desert city closer...